Ones have a fine eye for detail. They are always aware of the flaws in themselves, others and the situations in which they find themselves. This triggers their need to improve, which can be beneficial for all concerned, but which can also prove to be burdensome to both the One and those who are on the receiving end of the One's reform efforts.
The One's inability to achieve the perfection they desire feeds their feelings of guilt for having fallen short, and fuels their incipient anger against an imperfect world. Ones, however, tend to feel guilty about their anger. Anger is a "bad" emotion, and Ones strive sincerely and wholeheartedly to be "good." Anger is therefore vigorously repressed from consciousness, bursting forth in occasional fits of temper, but usually manifesting in one of its many less obvious permutations - impatience, frustration, annoyance and judgmental criticality. For this reason, Ones can be difficult to live with, but, on the high side, they tend to be loyal, responsible and capable partners and friends.